<template>
   <section class="loginContainer">
      <div class="loginInner">
        <div class="login_header">
          <h2 class="login_logo">丫丫外卖</h2>
          <div class="login_header_title">
            <a href="javascript:;" :class="{on:loginWay}" @click="loginWay=true">短信登录</a>
            <a href="javascript:;" :class="{on:!loginWay}" @click="loginWay=false">密码登录</a>
          </div>
        </div>
        <div class="login_content">
          <form @submit.prevent="login">
            <div :class="{on:loginWay}">
              <section class="login_message">
                <input type="tel" maxlength="11" placeholder="手机号" v-model="phone">
                <button :disabled="!rightPhone" class="get_verification" :class="{right_phone:rightPhone}" @click.prevent="getCode">{{computeTime>0 ? `已发送(${computeTime}s)` :'获取验证码'}}</button>
              </section>
              <section class="login_verification">
                <input type="tel" maxlength="8" placeholder="验证码" v-model="code">
              </section>
              <section class="login_hint">
                温馨提示：未注册丫丫外卖帐号的手机号，登录时将自动注册，且代表已同意
                <a href="javascript:;">《用户服务协议》</a>
              </section>
            </div>
            <div :class="{on:!loginWay}">
              <section>
                <section class="login_message">
                  <input type="tel" maxlength="11" placeholder="手机/邮箱/用户名" v-model="name">
                </section>
                <section class="login_verification">
                  <input type="text" maxlength="8" placeholder="密码" v-if="showPwd" v-model="pwd">
                  <input type="password" maxlength="8" placeholder="密码" v-else v-model="pwd">
                  <div class="switch_button" @click="showPwd=!showPwd" :class="showPwd ? 'on':'off'">
                    <div class="switch_circle" :class="{right: showPwd}" ></div>
                    <span class="switch_text">{{showPwd ? 'abc' : '...'}}</span>
                  </div>
                </section>
                <section class="login_message">
                  <input type="text" maxlength="11" placeholder="验证码" v-model="captcha">
                  <img class="get_verification" src="http://localhost:4000/captcha" alt="captcha" @click="getCaptcha" ref="captcha">
                </section>
              </section>
            </div>
            <button class="login_submit">登录</button>
          </form>
          <a href="javascript:;" class="about_us">关于我们</a>
        </div>
        <a href="javascript:" class="go_back" @click="$router.back()">
          <i class="iconfont icon-jiantou2"></i>
        </a>
      </div>
      <AlertTip :alertText="alertText" v-show="alertShow" @closeTip='closeTip'></AlertTip>
    </section>
</template>
<script>
import AlertTip from '../../components/AlertTip/AlertTip.vue'
import {reqSendCode,reqPwdLogin,reqSmsLogin} from '../../api'
export default {
    data(){
      return {
        loginWay : true,  //true 代表短信登录，false 代表密码登录
        phone:'',   //手机号
        computeTime: 0,  //计时为0
        showPwd: false, //是否显示密码
        pwd:'',//密码
        code:'',//短信验证码
        name:'',//用户名字
        captcha:'',//图形验证码
        alertText:'',//提示文本
        alertShow:false,// 是否显示提示框
         
      }
    },
    computed:{
      rightPhone () {
        return /^1\d{10}$/.test(this.phone)
      }
    },
    methods:{
       async getCode () {
        // 如果当前没有计时
        if(!this.computeTime) {
          // 启动倒计时
          this.computeTime = 30
          this.intervalId = setInterval(() => {
            this.computeTime--
            if(this.computeTime<=0) {
              // 停止计时
              clearInterval(this.intervalId)
            }
          }, 1000)
        
        //发送ajax请求  (想指定手机号发送短信)
        const result = await reqSendCode(this.phone)
          if(result.code===1) {
            // 显示提示
            this.showAlert(result.msg)
            // 停止计时
            if(this.computeTime) {
              this.computeTime = 0
              clearInterval(this.intervalId)
              this.intervalId = undefined
            }
          }
        }
      },
      showAlert(alertText){
            this.alertShow= true
            this.alertText=alertText
      },
      closeTip(){
        this.alertShow= false
        this.alertText=''
      },
      async login(){
        let result
        //实现异步登录  先进行前台表单验证 
        if(this.loginWay){  //短信登录  //当loginWay为空时    this.loginWay值是  false  所以加！ 
          const {rihgtPhone,phone, code} = this
          if(!this.rightPhone){//当rightPhone为空时    this.rightPhone 值是  false  所以加！ 
            //提示手机号不正确
           this.showAlert('手机号不正确')
           return
            
          }else if (!/^\d{6}$/.test(code)){//当name为空时    this.name 值是  false  所以加！ 
              //验证码必须是6位
              this.showAlert('验证码必须是6位')
              return
          }
          //发送ajax请求 验证短信 进行登录
          result = await reqSmsLogin(phone,code)
        

        }else{//密码登录
          const {name,pwd , captcha} = this
           if(!this.name){   //当name为空时    this.name 值是  false  所以加！ 
            //必须指定用户名
            this.showAlert('用户名不能为空')
            return
          }else if (!this.pwd){//当pwd为空时    this.pwd 值是  false  所以加！ 
              //密码必须指定
              this.showAlert('密码不能为空')
              return
          }else if (!this.captcha){//当captcha为空时    this.captcha 值是  false  所以加！ 
              //验证码必须指定
              this.showAlert('验证码错误')
              return
          }
          //发送ajax请求进行密码验证
            result = await reqPwdLogin({name,pwd,captcha})      
        } 
         // 停止计时
            if(this.computeTime) {
              this.computeTime = 0
              clearInterval(this.intervalId)
              this.intervalId = undefined
            }
        //根据结果数据处理
           if (result.code===0){  //代表验证成功
              const user = result.data
              //将user保存到vuex的state中
              this.$store.dispatch('recordUser',user)
              //去个人中心界面   路由跳转
              this.$router.replace('/profile')
           }else{
             // 显示新的图片验证码
              this.getCaptcha()
              const msg = result.msg      //校验失败
              //显示警告提示
              this.showAlert(msg)  
           } 
      },
      getCaptcha(){  //获取一个新的图片验证码
      //每次指定的src不一样
        this.$refs.captcha.src = 'http://localhost:4000/captcha?time='+Date.now()

      }
    },
    components:{
      AlertTip
    }
}
</script>
<style lang="stylus" rel="stylesheet/stylus">
@import "../../common/stylus/mixins.styl";
.loginContainer
      width 100%
      height 100%
      background #fff
      .loginInner
        padding-top 60px
        width 80%
        margin 0 auto
        .login_header
          .login_logo
            font-size 40px
            font-weight bold
            color #02a774
            text-align center
          .login_header_title
            padding-top 40px
            text-align center
            >a
              color #333
              font-size 14px
              padding-bottom 4px
              &:first-child
                margin-right 40px
              &.on
                color #02a774
                font-weight 700
                border-bottom 2px solid #02a774
        .login_content
          >form
            >div
              display none
              &.on
                display block
              input
                width 100%
                height 100%
                padding-left 10px
                box-sizing border-box
                border 1px solid #ddd
                border-radius 4px
                outline 0
                font 400 14px Arial
                &:focus
                  border 1px solid #02a774
              .login_message
                position relative
                margin-top 16px
                height 48px
                font-size 14px
                background #fff
                .get_verification
                  position absolute
                  top 50%
                  right 10px
                  transform translateY(-50%)
                  border 0
                  color #ccc
                  font-size 14px
                  background transparent
                  &.right_phone
                    color black
              .login_verification
                position relative
                margin-top 16px
                height 48px
                font-size 14px
                background #fff
                .switch_button
                  font-size 12px
                  border 1px solid #ddd
                  border-radius 8px
                  transition background-color .3s,border-color .3s
                  padding 0 6px
                  width 30px
                  height 16px
                  line-height 16px
                  color #fff
                  position absolute
                  top 50%
                  right 10px
                  transform translateY(-50%)
                  &.off
                    background #fff
                    .switch_text
                      float right
                      color #ddd
                  &.on
                    background #02a774
                  >.switch_circle
                    //transform translateX(27px)
                    position absolute
                    top -1px
                    left -1px
                    width 16px
                    height 16px
                    border 1px solid #ddd
                    border-radius 50%
                    background #fff
                    box-shadow 0 2px 4px 0 rgba(0,0,0,.1)
                    transition transform .3s
                    &.right
                      transform translateX(30px)
              .login_hint
                margin-top 12px
                color #999
                font-size 14px
                line-height 20px
                >a
                  color #02a774
            .login_submit
              display block
              width 100%
              height 42px
              margin-top 30px
              border-radius 4px
              background #4cd96f
              color #fff
              text-align center
              font-size 16px
              line-height 42px
              border 0
          .about_us
            display block
            font-size 12px
            margin-top 20px
            text-align center
            color #999
        .go_back
          position absolute
          top 5px
          left 5px
          width 30px
          height 30px
          >.iconfont
            font-size 20px
            color #999
</style>